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      <div><h1>Future&lt;<wbr><span class="type-parameter">T</span>&gt;.delayed constructor</h1></div>

    <section class="multi-line-signature">
      
      <span class="name ">Future&lt;<wbr><span class="type-parameter">T</span>&gt;.delayed</span>(<wbr><span class="parameter" id="delayed-param-duration"><span class="type-annotation"><a href="dart-core/Duration-class.html">Duration</a></span> <span class="parameter-name">duration</span>, [</span> <span class="parameter" id="delayed-param-computation"><span class="type-annotation"><a href="dart-async/FutureOr-class.html">FutureOr</a><span class="signature">&lt;<wbr><span class="type-parameter">T</span>&gt;</span></span> <span class="parameter-name">computation</span>()</span> ])
    </section>

    <section class="desc markdown">
      <p>Creates a future that runs its computation after a delay.</p>
<p>The <code>computation</code> will be executed after the given <code>duration</code> has passed,
and the future is completed with the result of the computation.</p>
<p>If <code>computation</code> returns a future,
the future returned by this constructor will complete with the value or
error of that future.</p>
<p>If the duration is 0 or less,
it completes no sooner than in the next event-loop iteration,
after all microtasks have run.</p>
<p>If <code>computation</code> is omitted,
it will be treated as if <code>computation</code> was <code>() =&gt; null</code>,
and the future will eventually complete with the <code>null</code> value.</p>
<p>If calling <code>computation</code> throws, the created future will complete with the
error.</p>
<p>See also <a href="dart-async/Completer-class.html">Completer</a> for a way to create and complete a future at a
later time that isn't necessarily after a known fixed duration.</p>
    </section>
    
    <section class="summary source-code" id="source">
      <h2><span>Implementation</span></h2>
      <pre class="language-dart"><code class="language-dart">factory Future.delayed(Duration duration, [FutureOr&lt;T&gt; computation()]) {
  _Future&lt;T&gt; result = new _Future&lt;T&gt;();
  new Timer(duration, () {
    if (computation == null) {
      result._complete(null);
    } else {
      try {
        result._complete(computation());
      } catch (e, s) {
        _completeWithErrorCallback(result, e, s);
      }
    }
  });
  return result;
}</code></pre>
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